High adhesion quick curing water-based ink

Abstract

The application discloses a high-adhesion quick-curing water-based ink, which comprises the following raw materials in parts by weight: 10-15 parts of modified resin, 10-15 parts of pigment, 20-25 parts of solvent, 3-5 parts of modified leveling agent, 1-2 parts of defoaming agent and 1-2 parts of photoinitiator; the modified resin and the leveling agent are modified, end double bonds are introduced into the resin and the leveling agent, and the end double bonds are self-crosslinked and externally crosslinked under the action of the photoinitiator and UV light, so that the water-based ink is quickly cured, the water-based ink has good adhesion and relatively fast curing speed, and the surface mechanical properties of the water-based ink are improved; the modified leveling agent contains silicone straight-chain and side-chain polyether, the dispersion of the pigment in the water-based ink is improved, and the water resistance and light resistance of the ink are enhanced.

Description

Technical Field

[0001] This invention relates to the field of water-based inks, and more specifically to a water-based ink with high adhesion and rapid curing. Background Technology

[0002] Water-based inks, as an environmentally friendly type of ink, are increasingly favored by the packaging and printing industry worldwide due to their characteristics such as low volatile organic compounds during printing, no harm to the health of printing operators, and minimal environmental impact. Water-based inks are mainly made from water-soluble resins, pigments, solvents, and related additives through compound grinding. Water-soluble resins, also known as binders, are an important component of water-based inks, directly affecting the ink's adhesion, drying speed, anti-smudging properties, and heat resistance. At the same time, they also affect gloss and ink transfer properties.

[0003] Acrylic resin is a common water-soluble resin that can be used as a highly efficient wetting agent and abrasive. When used in water-based inks, it helps with dispersion and coloring, provides good gloss, reduces pigment usage, and is environmentally friendly. However, acrylic resin has the disadvantages of slow drying and poor continuous film formation. Organosilicon leveling agents are a common type of leveling agent that can form a monolayer on the surface of the ink coating, giving it a uniform surface tension. This allows the bottom layer of the ink to be well wetted, while the top layer can flow evenly, avoiding surface defects such as pinholes, orange peel, and flow marks. However, organosilicon materials also have disadvantages such as low hardness, low strength, poor compatibility with other materials, and low adhesion. Summary of the Invention

[0004] To address the aforementioned problems, the present invention aims to provide a water-based ink with high adhesion and rapid curing.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A high-adhesion, fast-curing water-based ink comprises the following raw materials in parts by weight: 10-15 parts modified resin, 10-15 parts pigment, 20-25 parts solvent, 3-5 parts modified leveling agent, 1-2 parts defoamer, and 1-2 parts photoinitiator;

[0007] The high-adhesion, fast-curing water-based ink is synthesized through the following steps:

[0008] Modified resin and pigment are added to solvent and stirred at a stirring rate of 1000-1200 rpm for 30 min. Then, modified leveling agent and defoamer are added and stirred at a stirring rate of 1000-1200 rpm for 30 min. Finally, photoinitiator is added and stirred at a stirring rate of 1000-1200 rpm for 10 min to obtain a water-based ink with high adhesion and fast curing.

[0009] The modified resin is prepared by the following steps:

[0010] A1: Isophorone diisocyanate and 2,2-dimethylolbutyric acid were added to a container, and dibutyltin dilaurate was added. The mixture was reacted for 2 hours at a stirring rate of 100-200 rpm and a temperature of 50°C to obtain intermediate 1. The ratio of isophorone diisocyanate, 2,2-dimethylolbutyric acid and dibutyltin dilaurate was 1 mol: 1.2-1.4 mol: 0.005 mol.

[0011] During the reaction, isophorone diisocyanate and 2,2-dihydroxymethylbutyric acid undergo a nucleophilic reaction to give isocyanate-terminated intermediate 1;

[0012]

[0013] A2: Add intermediate 1 and di-n-butyltin dilaurate to a container, stir and slowly add hydroxyethyl acrylate, react at a stirring rate of 200-300 rpm and 50℃ for 3-4 h, and then evaporate under reduced pressure to obtain intermediate 2. The ratio of intermediate 1, hydroxyethyl acrylate and di-n-butyltin dilaurate is 1 mol: 2-2.2 mol: 0.005 mol.

[0014] During the reaction, the isocyanate group in intermediate 1 reacts with the hydroxyl group in hydroxyethyl acrylate to obtain intermediate 2, introducing a terminal double bond;

[0015]

[0016] A3: Under nitrogen protection, intermediate 2 and polyacrylic acid were added to N,N-dimethylacetamide, stirred, and 1,6-hexanediamine was added. The mixture was reacted at a stirring rate of 200-300 rpm and 120°C for 4-6 hours. The mixture was then evaporated under reduced pressure to obtain the modified resin. The ratio of intermediate 2, polyacrylic acid, 1,6-hexanediamine, and N,N-dimethylacetamide was 1 mol: 1-1.2 mol: 2-2.2 mol: 500 mL.

[0017] During the reaction, the carboxyl groups in intermediate 2 and polyacrylic acid react with the amino groups in 1,6-hexanediamine to form an amide structure, resulting in a modified resin. The 1,6-hexanediamine links intermediate 2 with polyacrylic acid to form a cross-linked network structure, which can effectively improve the surface mechanical properties of the ink after curing. Furthermore, the modified resin contains a large number of carboxyl groups, giving it good hydrophilicity. At the same time, intermediate 2, which has a polyurethane structure and terminal double bond groups, is introduced. The polyurethane structure can effectively improve the water absorption of the ink, while the terminal double bond groups provide unsaturated active groups for subsequent UV curing, which can effectively improve the curing ability of the ink. After cross-linking, intermediate 2 and polyacrylic acid have good adhesion to non-absorbent substrates, which can effectively improve the adhesion of the ink.

[0018]

[0019] The modified leveling agent is prepared by the following steps:

[0020] B1: Under nitrogen protection, hydrogen-containing silicone oil and isopropanol chloroplatinate solution were added to toluene, stirred and heated to 100℃, and 2-ethyl-2-[(2-vinyloxy)methyl]-1,3-propanediol was slowly added dropwise. The reaction was carried out at a stirring rate of 200-300 rpm and 100℃ for 10-12 h. The mixture was then rotary evaporated under reduced pressure, washed three times with methanol, and dried under vacuum at 80℃ for 12 h to obtain intermediate a. The molecular weight of the hydrogen-containing silicone oil was 2000 and the hydrogen content was 0.2%. The mass fraction of the isopropanol chloroplatinate solution was 0.1%. The ratio of the amount of hydrogen-containing silicone oil, 2-ethyl-2-[(2-vinyloxy)methyl]-1,3-propanediol, isopropanol chloroplatinate solution and toluene was 300 g: 0.4-0.5 mol: 5 mL: 200 mL.

[0021] During the reaction, the silane-hydrogen bonds in the hydrogen-containing silicone oil undergo a hydrosilylation reaction with the double bonds in 2-ethyl-2-[(2-vinyloxy)methyl]-1,3-propanediol under the action of a platinum catalyst, introducing side-chain hydroxyl groups to obtain intermediate a;

[0022]

[0023] B2: Under nitrogen protection, intermediate a, dicyclohexylmethane 4,4-diisocyanate, and polypropylene glycol were added to a container, heated to 80°C, and dibutyltin dilaurate was added. The mixture was reacted at a stirring rate of 200-300 rpm and 80°C for 3-4 hours. The mixture was then evaporated under reduced pressure to obtain intermediate b. The molecular weight of the polypropylene glycol was 500. The ratio of intermediate a, polypropylene glycol, dicyclohexylmethane 4,4-diisocyanate, and dibutyltin dilaurate was 400g:300g:1.2-1.5mol:0.005mol.

[0024] During the reaction, the hydroxyl groups in intermediate a and polypropylene glycol react with the isocyanate groups in 4,4-diisocyanate dicyclohexylmethane, introducing side-chain polyethers and isocyanate groups to obtain intermediate b.

[0025]

[0026] B3: Under nitrogen protection, intermediate b and dibutyltin dilaurate were added to a container, stirred and hydroxyethyl acrylate was slowly added dropwise. The reaction was carried out at a stirring rate of 200-300 rpm and 50°C for 3-4 hours. The mixture was then evaporated under reduced pressure to obtain the modified leveling agent. The ratio of intermediate b, hydroxyethyl acrylate and dibutyltin dilaurate was 100 g: 0.8-1 mol: 0.005 mol.

[0027] During the reaction, the isocyanate group on intermediate b reacts with the hydroxyl group in hydroxyethyl acrylate, introducing a double bond end to obtain a modified leveling agent. The modified leveling agent contains silicone oil linear chain and side chain polyether. Due to the low surface tension of the silicone oil linear chain and the carbon-philic and hydrophilic characteristics of the polyether chain segment, the compatibility and adhesion of the silicone oil are effectively improved. It not only has the good leveling effect of ordinary silicone oil, but also improves the shortcomings of ordinary silicone oil in affecting recoating and hydrophobicity, thus improving its leveling performance. The double bond end allows the leveling agent to participate in the curing process of the ink, improving the ink's anti-fouling ability and accelerating the curing process of the ink.

[0028]

[0029] The pigment is at least one of iron oxide red and organic yellow;

[0030] The solvent is a mixture of water and ethanol, with a volume ratio of water to ethanol of 4:1;

[0031] The defoamer is a polyether-type defoamer;

[0032] The photoinitiator is at least one of 2-hydroxy-2-methyl-1-phenylpropanone and 2-hydroxy-2-methyl-1-[4-(2-hydroxyethoxy)phenyl]-1-propanone.

[0033] The beneficial effects of this invention are as follows: This invention prepares a water-based ink with high adhesion and rapid curing. By modifying the binder resin and leveling agent, the water-based ink possesses good adhesion and a fast curing speed. Terminal double bonds are introduced into the resin and leveling agent, which undergo self-crosslinking and external crosslinking under the action of photoinitiators and UV light, enabling the water-based ink to cure rapidly and overcoming the slow drying speed of polyacrylic acid. Furthermore, the 1,6-hexanediamine in the modified resin connects intermediate 2 with polyacrylic acid, forming a crosslinked network structure, which effectively improves the surface mechanical properties of the cured ink. Simultaneously, the presence of a large number of carboxyl groups in the modified resin enhances its properties. It possesses excellent hydrophilicity, and the resulting polyurethane structure effectively improves the water absorption properties of inks and enhances the adhesion of cured water-based inks. The modified leveling agent contains silicone oil linear and side-chain polyethers. Due to the low surface tension of the silicone oil linear chain and the carbon-philic and hydrophilic characteristics of the polyether segments, it effectively improves the compatibility and adhesion of silicone oil. This not only gives it the good leveling effect of ordinary silicone oil but also overcomes the shortcomings of ordinary silicone oil in affecting recoating and hydrophobicity, thus improving its leveling performance. The terminal double bonds allow the modified leveling agent to participate in the curing process of water-based inks, and the resulting cross-linked structure effectively improves the surface mechanical properties of water-based inks. Detailed Implementation

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Example 1

[0036] The modified resin is prepared by the following steps:

[0037] A1: Isophorone diisocyanate and 2,2-dimethylolbutyric acid were added to a container, and dibutyltin dilaurate was added. The mixture was reacted at a stirring rate of 100 rpm and a temperature of 50 °C for 2 h to obtain intermediate 1. The ratio of isophorone diisocyanate, 2,2-dimethylolbutyric acid and dibutyltin dilaurate was 1 mol: 1.2 mol: 0.005 mol.

[0038] A2: Intermediate 1 and di-n-butyltin dilaurate were added to a container, stirred and hydroxyethyl acrylate was slowly added dropwise. The reaction was carried out at a stirring rate of 200 rpm and 50 °C for 4 h. The mixture was then evaporated under reduced pressure to obtain intermediate 2. The ratio of intermediate 1, hydroxyethyl acrylate and di-n-butyltin dilaurate was 1 mol: 2 mol: 0.005 mol.

[0039] A3: Under nitrogen protection, intermediate 2 and polyacrylic acid were added to N,N-dimethylacetamide, stirred, and 1,6-hexanediamine was added. The mixture was reacted at a stirring rate of 200 rpm and a temperature of 120°C for 4 h. The mixture was then evaporated under reduced pressure to obtain the modified resin. The ratio of intermediate 2, polyacrylic acid, 1,6-hexanediamine, and N,N-dimethylacetamide was 1 mol: 1 mol: 2 mol: 500 mL.

[0040] Example 2

[0041] The modified resin is prepared by the following steps:

[0042] A1: Isophorone diisocyanate and 2,2-dimethylolbutyric acid were added to a container, and dibutyltin dilaurate was added. The mixture was reacted at a stirring rate of 200 rpm and a temperature of 50 °C for 2 h to obtain intermediate 1. The ratio of isophorone diisocyanate, 2,2-dimethylolbutyric acid and dibutyltin dilaurate was 1 mol: 1.2 mol: 0.005 mol.

[0043] A2: Intermediate 1 and di-n-butyltin dilaurate were added to a container, stirred and hydroxyethyl acrylate was slowly added dropwise. The reaction was carried out at a stirring rate of 300 rpm and 50 °C for 2 h. The mixture was then evaporated under reduced pressure to obtain intermediate 2. The ratio of intermediate 1, hydroxyethyl acrylate and di-n-butyltin dilaurate was 1 mol: 2.2 mol: 0.005 mol.

[0044] A3: Under nitrogen protection, intermediate 2 and polyacrylic acid were added to N,N-dimethylacetamide, stirred, and 1,6-hexanediamine was added. The mixture was reacted at a stirring rate of 300 rpm and a temperature of 120°C for 6 h. The mixture was then evaporated under reduced pressure to obtain the modified resin. The ratio of intermediate 2, polyacrylic acid, 1,6-hexanediamine, and N,N-dimethylacetamide was 1 mol: 1 mol: 2 mol: 500 mL.

[0045] Example 3

[0046] The modified resin is prepared by the following steps:

[0047] A1: Isophorone diisocyanate and 2,2-dimethylolbutyric acid were added to a container, and dibutyltin dilaurate was added. The mixture was reacted for 2 hours at a stirring rate of 200 rpm and a temperature of 50°C to obtain intermediate 1. The ratio of isophorone diisocyanate, 2,2-dimethylolbutyric acid and dibutyltin dilaurate was 1 mol: 1.4 mol: 0.005 mol.

[0048] A2: Intermediate 1 and di-n-butyltin dilaurate were added to a container, stirred and hydroxyethyl acrylate was slowly added dropwise. The reaction was carried out at a stirring rate of 300 rpm and 50 °C for 4 h. The mixture was then evaporated under reduced pressure to obtain intermediate 2. The ratio of intermediate 1, hydroxyethyl acrylate and di-n-butyltin dilaurate was 1 mol: 2.2 mol: 0.005 mol.

[0049] A3: Under nitrogen protection, intermediate 2 and polyacrylic acid were added to N,N-dimethylacetamide, stirred, and 1,6-hexanediamine was added. The mixture was reacted at a stirring rate of 300 rpm and a temperature of 120°C for 6 h. The mixture was then evaporated under reduced pressure to obtain the modified resin. The ratio of intermediate 2, polyacrylic acid, 1,6-hexanediamine, and N,N-dimethylacetamide was 1 mol: 1-1.2 mol: 2-2.2 mol: 500 mL.

[0050] Example 4

[0051] The modified leveling agent is prepared by the following steps:

[0052] B1: Under nitrogen protection, hydrogen-containing silicone oil and isopropanol chloroplatinate solution were added to toluene, stirred and heated to 100℃, and 2-ethyl-2-[(2-vinyloxy)methyl]-1,3-propanediol was slowly added dropwise. The reaction was carried out at a stirring rate of 200-300 rpm and 100℃ for 10-12 h. The mixture was then rotary evaporated under reduced pressure, washed three times with methanol, and dried under vacuum at 80℃ for 12 h to obtain intermediate a. The molecular weight of the hydrogen-containing silicone oil was 2000 and the hydrogen content was 0.2%. The mass fraction of the isopropanol chloroplatinate solution was 0.1%. The ratio of the amount of hydrogen-containing silicone oil, 2-ethyl-2-[(2-vinyloxy)methyl]-1,3-propanediol, isopropanol chloroplatinate solution and toluene was 300 g: 0.4-0.5 mol: 5 mL: 200 mL.

[0053] B2: Under nitrogen protection, intermediate a, dicyclohexylmethane 4,4-diisocyanate, and polypropylene glycol were added to a container, heated to 80°C, and dibutyltin dilaurate was added. The mixture was reacted at a stirring rate of 200-300 rpm and 80°C for 3-4 hours. The mixture was then evaporated under reduced pressure to obtain intermediate b. The molecular weight of the polypropylene glycol was 500. The ratio of intermediate a, polypropylene glycol, dicyclohexylmethane 4,4-diisocyanate, and dibutyltin dilaurate was 400g:300g:1.2-1.5mol:0.005mol.

[0054] B3: Under nitrogen protection, intermediate b and dibutyltin dilaurate were added to a container, stirred and hydroxyethyl acrylate was slowly added dropwise. The reaction was carried out at a stirring rate of 200-300 rpm and 50°C for 3-4 hours. The mixture was then evaporated under reduced pressure to obtain the modified leveling agent. The ratio of intermediate b, hydroxyethyl acrylate and dibutyltin dilaurate was 100 g: 0.8-1 mol: 0.005 mol.

[0055] Example 5

[0056] The modified leveling agent is prepared by the following steps:

[0057] B1: Under nitrogen protection, hydrogen-containing silicone oil and isopropanol chloroplatinate solution were added to toluene, stirred and heated to 100℃, and 2-ethyl-2-[(2-vinyloxy)methyl]-1,3-propanediol was slowly added dropwise. The reaction was carried out at a stirring rate of 300 rpm and 100℃ for 12 h. The mixture was then rotary evaporated under reduced pressure, washed three times with methanol, and dried under vacuum at 80℃ for 12 h to obtain intermediate a. The molecular weight of the hydrogen-containing silicone oil was 2000 and the hydrogen content was 0.2%. The mass fraction of the isopropanol chloroplatinate solution was 0.1%. The ratio of the amount of hydrogen-containing silicone oil, 2-ethyl-2-[(2-vinyloxy)methyl]-1,3-propanediol, isopropanol chloroplatinate solution and toluene was 300 g: 0.4 mol: 5 mL: 200 mL.

[0058] B2: Under nitrogen protection, intermediate a, dicyclohexylmethane 4,4-diisocyanate, and polypropylene glycol were added to a container, heated to 80°C, and dibutyltin dilaurate was added. The mixture was reacted for 4 hours at a stirring rate of 300 rpm and a temperature of 80°C. The mixture was then subjected to rotary evaporation under reduced pressure to obtain intermediate b. The molecular weight of the polypropylene glycol was 500. The ratio of intermediate a, polypropylene glycol, dicyclohexylmethane 4,4-diisocyanate, and dibutyltin dilaurate was 400 g: 300 g: 1.2 mol: 0.005 mol.

[0059] B3: Under nitrogen protection, intermediate b and dibutyltin dilaurate were added to a container, stirred and hydroxyethyl acrylate was slowly added dropwise. The reaction was carried out at a stirring rate of 300 rpm and 50°C for 4 h. The modified leveling agent was obtained by rotary evaporation under reduced pressure. The ratio of intermediate b, hydroxyethyl acrylate and dibutyltin dilaurate was 100 g: 0.8 mol: 0.005 mol.

[0060] Example 6

[0061] The modified leveling agent is prepared by the following steps:

[0062] B1: Under nitrogen protection, hydrogen-containing silicone oil and isopropanol chloroplatinate solution were added to toluene, stirred and heated to 100℃, and 2-ethyl-2-[(2-vinyloxy)methyl]-1,3-propanediol was slowly added dropwise. The reaction was carried out at a stirring rate of 300 rpm and 100℃ for 10 h. The mixture was then evaporated under reduced pressure, washed three times with methanol, and dried under vacuum at 80℃ for 12 h to obtain intermediate a. The molecular weight of the hydrogen-containing silicone oil was 2000 and the hydrogen content was 0.2%. The mass fraction of the isopropanol chloroplatinate solution was 0.1%. The ratio of the amount of hydrogen-containing silicone oil, 2-ethyl-2-[(2-vinyloxy)methyl]-1,3-propanediol, isopropanol chloroplatinate solution and toluene was 300 g: 0.5 mol: 5 mL: 200 mL.

[0063] B2: Under nitrogen protection, intermediate a, dicyclohexylmethane 4,4-diisocyanate and polypropylene glycol were added to a container, heated to 80°C, and dibutyltin dilaurate was added. The mixture was reacted for 4 hours at a stirring rate of 300 rpm and 80°C, and then rotary evaporated under reduced pressure to obtain intermediate b. The molecular weight of polypropylene glycol was 500. The ratio of intermediate a, polypropylene glycol, dicyclohexylmethane 4,4-diisocyanate and dibutyltin dilaurate was 400 g: 300 g: 1.5 mol: 0.005 mol.

[0064] B3: Under nitrogen protection, intermediate b and dibutyltin dilaurate were added to a container, stirred and hydroxyethyl acrylate was slowly added dropwise. The reaction was carried out at a stirring rate of 300 rpm and 50°C for 4 h. The mixture was then evaporated under reduced pressure to obtain the modified leveling agent. The ratio of intermediate b, hydroxyethyl acrylate and dibutyltin dilaurate was 100 g: 1 mol: 0.005 mol.

[0065] Example 7

[0066] A high-adhesion, fast-curing water-based ink comprises the following raw materials in parts by weight: 10 parts modified resin, 10 parts commercially available 154 organic yellow pigment, 20 parts solvent, 3 parts modified leveling agent, 1 part commercially available THIX-288 defoamer, and 1 part commercially available 2959 photoinitiator;

[0067] The solvent is a mixture of water and ethanol, with a volume ratio of water to ethanol of 4:1;

[0068] The high-adhesion, fast-curing water-based ink is synthesized through the following steps:

[0069] Modified resin and 154 organic yellow pigment were added to the solvent and stirred at 1000 rpm for 30 min. Then, modified leveling agent and THIX-288 defoamer were added and stirred at 1000 rpm for 30 min. Finally, 2959 photoinitiator was added and stirred at 1000 rpm for 10 min to obtain a water-based ink with high adhesion and fast curing.

[0070] Example 8

[0071] A high-adhesion, fast-curing water-based ink comprises the following raw materials in parts by weight: 10 parts modified resin, 10 parts commercially available iron oxide red pigment, 20 parts solvent, 5 parts modified leveling agent, 2 parts commercially available THIX-288 defoamer, and 2 parts commercially available 2959 photoinitiator;

[0072] The solvent is a mixture of water and ethanol, with a volume ratio of water to ethanol of 4:1.

[0073] The high-adhesion, fast-curing water-based ink is synthesized through the following steps:

[0074] Modified resin and iron oxide red pigment were added to the solvent and stirred at 1000 rpm for 30 min. Then, modified leveling agent and THIX-288 defoamer were added and stirred at 1000 rpm for 30 min. Finally, 2959 photoinitiator was added and stirred at 1000 rpm for 10 min to obtain a water-based ink with high adhesion and fast curing.

[0075] Example 9

[0076] A high-adhesion, fast-curing water-based ink comprises the following raw materials in parts by weight: 15 parts modified resin, 15 parts commercially available 154 organic yellow pigment, 25 parts solvent, 5 parts modified leveling agent, 2 parts commercially available THIX-288 defoamer, and 2 parts commercially available 1173 photoinitiator.

[0077] The solvent is a mixture of water and ethanol, with a volume ratio of water to ethanol of 4:1;

[0078] The high-adhesion, fast-curing water-based ink is synthesized through the following steps:

[0079] Modified resin and 154 organic yellow pigment were added to the solvent and stirred at 1200 rpm for 30 min. Then, modified leveling agent and THIX-288 defoamer were added and stirred at 1200 rpm for 30 min. Finally, 1173 photoinitiator was added and stirred at 1200 rpm for 10 min to obtain a water-based ink with high adhesion and fast curing.

[0080] Comparative Example 1

[0081] Comparative Example 1 is a commercially available water-based polyacrylic ink;

[0082] Comparative Example 2

[0083] In Comparative Example 2, the modified resin in Example 9 was replaced with a commercially available B-811 acrylic resin, and all other steps were exactly the same as in Example 9, to obtain a water-based ink.

[0084] Comparative Example 3

[0085] In Comparative Example 3, the modified leveling agent in Example 9 was replaced with a commercially available MONENG-1070 silicone leveling agent, and all other steps were exactly the same as in Example 9, to obtain a water-based ink.

[0086] The water-based inks from Examples 7, 8, 8, 8, 1, 2, and 3 were tested for performance according to GB / T1728-2020, GB / T 6739-2022, GB / T 9286-2021, GB / T13217.2-2009, ASTM D2247–2015, GB / T13217.1-2020, and GB / T 250-2008 standards. The specific test results are shown in the table below:

[0087]

[0088] As shown in the table, the test results indicate that Examples 7, 8, and 9 outperformed the commercially available water-based inks in all aspects compared to Comparative Example 1. In Example 9, replacing the modified resin with commercially available B-811 acrylic resin significantly reduced curing speed, adhesion, hardness, and lightfastness. Similarly, in Example 9, replacing the modified leveling agent with commercially available MONENG-1070 silicone leveling agent reduced curing speed, gloss, and coloring ability. These findings demonstrate that modified resins and leveling agents can effectively improve the curing speed and adhesion of water-based inks, while also enhancing their surface mechanical properties, improving pigment dispersion in water-based inks, and strengthening their water and lightfastness resistance.

[0089] The above description is merely an example and illustration of the concept of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the concept of the invention or exceed the scope defined in the claims, they should all fall within the protection scope of the present invention.

Claims

1. A water-based ink with high adhesion and rapid curing, characterized in that: It includes the following raw materials in parts by weight: 10-15 parts modified resin, 10-15 parts pigment, 20-25 parts solvent, 3-5 parts modified leveling agent, 1-2 parts defoamer and 1-2 parts photoinitiator; The high-adhesion, fast-curing water-based ink is synthesized through the following steps: Modified resin and pigment are added to solvent and stirred at a stirring rate of 1000-1200 rpm for 30 min. Then, modified leveling agent and defoamer are added and stirred at a stirring rate of 1000-1200 rpm for 30 min. Finally, photoinitiator is added and stirred at a stirring rate of 1000-1200 rpm for 10 min to obtain a water-based ink with high adhesion and fast curing. The modified resin is prepared by the following steps: A1: Isophorone diisocyanate and 2,2-dimethylolbutyric acid were added to a container, and dibutyltin dilaurate was added. The mixture was reacted for 2 hours at a stirring rate of 100-200 rpm and a temperature of 50°C to obtain intermediate 1. A2: Add intermediate 1 and di-n-butyltin dilaurate to a container, stir and slowly add hydroxyethyl acrylate, react at a stirring rate of 200-300 rpm and 50°C for 3-4 h, and then evaporate under reduced pressure to obtain intermediate 2. A3: Under nitrogen protection, intermediate 2 and polyacrylic acid were added to N,N-dimethylacetamide, stirred and 1,6-hexanediamine was added. The mixture was reacted at a stirring rate of 200-300 rpm and 120°C for 4-6 hours, and then rotary evaporated under reduced pressure to obtain the modified resin. The modified leveling agent is prepared by the following steps: B1: Under nitrogen protection, a solution of hydrogen-containing silicone oil and isopropanol chloroplatinic acid was added to toluene, stirred and heated to 100°C, and 2-ethyl-2-[(2-vinyloxy)methyl]-1,3-propanediol was slowly added dropwise. The reaction was carried out at a stirring rate of 200-300 rpm and 100°C for 10-12 h. The mixture was then rotary evaporated under reduced pressure, washed three times with methanol, and dried under vacuum at 80°C for 12 h to obtain intermediate a. B2: Under nitrogen protection, intermediate a, 4,4-diisocyanate dicyclohexylmethane and polypropylene glycol were added to a container, heated to 80°C, and dibutyltin dilaurate was added. The mixture was reacted at a stirring rate of 200-300 rpm and 80°C for 3-4 hours, and then rotary evaporated under reduced pressure to obtain intermediate b. B3: Under nitrogen protection, intermediate b and di-n-butyltin dilaurate were added to a container, stirred and hydroxyethyl acrylate was slowly added dropwise. The mixture was reacted at a stirring rate of 200-300 rpm and 50°C for 3-4 hours, and then rotary evaporated under reduced pressure to obtain the modified leveling agent.

2. The high-adhesion, fast-curing water-based ink according to claim 1, characterized in that: In step A1, the ratio of isophorone diisocyanate, 2,2-dimethylolbutyric acid, and di-n-butyltin dilaurate is 1 mol: 1.2-1.4 mol: 0.005 mol; In step A2, the ratio of intermediate 1, hydroxyethyl acrylate, and dibutyltin dilaurate is 1 mol: 2-2.2 mol: 0.005 mol. In step A3, the ratio of intermediate 2, polyacrylic acid, 1,6-hexanediamine, and N,N-dimethylacetamide is 1 mol: 1-1.2 mol: 2-2.2 mol: 500 mL.

3. The high-adhesion, fast-curing water-based ink according to claim 2, characterized in that: In step B1, the molecular weight of the hydrogen-containing silicone oil is 2000, the hydrogen content is 0.2%, the mass fraction of the isopropanol chloroplatinate solution is 0.1%, and the ratio of the hydrogen-containing silicone oil, 2-ethyl-2-[(2-vinyloxy)methyl]-1,3-propanediol, isopropanol chloroplatinate solution, and toluene is 300g:0.4-0.5mol:5mL:200mL. In step B2, the molecular weight of polypropylene glycol is 500, and the ratio of intermediate a, polypropylene glycol, 4,4-diisocyanate bicyclic and dibutyltin dilaurate is 400g:300g:1.2-1.5mol:0.005mol. In step B3, the ratio of intermediate b, hydroxyethyl acrylate, and di-n-butyltin dilaurate is 100g:0.8-1mol:0.005mol.

4. The high-adhesion, fast-curing water-based ink according to claim 1, characterized in that: The pigment is at least one of iron oxide red and organic yellow.

5. The high-adhesion, fast-curing water-based ink according to claim 1, characterized in that: The solvent is a mixture of water and ethanol, with a volume ratio of water to ethanol of 4:

1.

6. The high-adhesion, fast-curing water-based ink according to claim 1, characterized in that: The defoamer is a polyether-type defoamer.

7. The high-adhesion, fast-curing water-based ink according to claim 1, characterized in that: The photoinitiator is at least one of 2-hydroxy-2-methyl-1-phenylpropanone and 2-hydroxy-2-methyl-1-[4-(2-hydroxyethoxy)phenyl]-1-propanone.

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